An analysis of the noise associated with electronic charge injection in charge-coupled devices (CCDs) is presented, including the effects of diffusion currents. The capacitance of the injection circuit determines the charge-injection noise, and specification of the noise requires consideration of the quoted capacitance; for large charge packets, the noise has a characteristic variance of kTC/2 or kTC, depending on whether the capacitance is defined by microscopic (internal) or macroscopic… CONTINUE READING